Lateral Wall of the Cavum Nasi in Man. 655 



the conchal cartilage or bone. At times we find marked furrows 

 on the conchal cartilage yet the surface remains unfurrowed in 

 these positions. Killian concludes, therefore, that "der Knorpel 

 scheint demnach weit conservativer in der Bewahrung der 

 urspriinglichen Form zu sein, als die Schleimhaut." 



The two most constant of these furrows according to my speci- 

 mens are what may be termed, (1) the superior and (2) the infe- 

 rior (fig. 25) . In fig. 22 we have an extensively developed superior 

 furrow. It more or less splits the descending crus of the concha 

 media into superior and inferior portions. The latter condition 

 led some former investigators (Zuckerkandl and others) errone- 

 ously to consider the deep furrow as one of the chief ethmoidal 

 furrows, and the portion of the concha media superior to the fur- 

 row, as a separate ethmoidal concha (mittlere Siebbeinmuschel, 

 Zuckerkandl). Seydel later showed the error of this- contention, 

 and Zuckerkandl subsequently retracts from his former view in the 

 following words : '/ Dagegen mochte ich das Gleiche f iir die untere 

 Siebbeinmuschel nicht mehr aufrecht erhalten, denn wir haben 

 erfahren, dass die mittlere Siebbeinmuschel nicht nur aus einer 



Teilung der Concha ethmoidalis inferior hervorgeht 



und stimme O. Seydel bei, der die untere Siebbeinmuschel als 

 Reprasentantin eines einzigen Riechwulstes ansieht." 



Killian refers to the furrows of the concha media as 'Neben- 

 furchen,' and the notch formed by the inferior furrow differen- 

 tiating to the free inferior border of the concha media, dorsal to 

 the lobule of the knee, as the 'Incisura retrolobularis' (fig. 21). 

 Sometimes the superior furrow is broken into three oi more grooves, 

 rather obliquely placed, the ventral one being as a rule the best 

 marked (fig. 24). 



Accessory nasal folds (conchae) and furrows 



Upon turning superiorly the concha nasalis media of the adult 

 nose we expose for study the bulla ethmoidalis and the processus 

 uncinatus — accessory conchae of the meatus nasi medius. By 

 removing the concha nasalis superior we also expose in very 



